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Add x86_64-linux-gnu emulator

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I wanted a tiny scriptable meltdown proof way to run userspace programs
and visualize how program execution impacts memory. It helps to explain
how things like Actually Portable Executable works. It can show you how
the GCC generated code is going about manipulating matrices and more. I
didn't feel fully comfortable with Qemu and Bochs because I'm not smart
enough to understand them. I wanted something like gVisor but with much
stronger levels of assurances. I wanted a single binary that'll run, on
all major operating systems with an embedded GPL barrier ZIP filesystem
that is tiny enough to transpile to JavaScript and run in browsers too.

https://justine.storage.googleapis.com/emulator625.mp4
This commit is contained in:
Justine Tunney 2020-08-25 04:23:25 -07:00
parent 467504308a
commit f4f4caab0e
1052 changed files with 65667 additions and 7825 deletions
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2
third_party/compiler_rt/int_lib.h vendored
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@ -16,6 +16,7 @@
#ifndef INT_LIB_H
#define INT_LIB_H
#define CRT_HAS_128BIT 1
/* Assumption: lool univac arithmetic */
/* Assumption: lool cray signed shift */
@ -74,6 +75,7 @@ COMPILER_RT_ABI su_int __udivmodsi4(su_int a, su_int b, su_int* rem);
COMPILER_RT_ABI du_int __udivmoddi4(du_int a, du_int b, du_int* rem);
#ifdef CRT_HAS_128BIT
COMPILER_RT_ABI si_int __clzti2(ti_int a);
COMPILER_RT_ABI ti_int __divmodti4(ti_int a, ti_int b, tu_int *rem);
COMPILER_RT_ABI tu_int __udivmodti4(tu_int a, tu_int b, tu_int* rem);
#endif